s='wuya is python'print s.partition('is')#替换字符串 print s.replace('wuya','selenium')#rfind()从右向左找 print s.rfind('wuya')#bytes可以把字符串转成字节 str5='无涯'printbytes(str5) 见如上的代码,字符串使用到的方法都总结在这里了。
re.sub( r"\\\w+\s*", # a backslash followed by alphanumerics; '', # replace it with an empty string; input_string # in your input string ) >>> re.sub(r"\\\w+\s*", "", r"\fs24 hello there") 'hello there' >>> re.sub(r"\\\w+\s*", "", "hello there") 'hello...
237 """ 238 pass 239 240 def replace(self, old, new, count=None): 241 """ 替换 """ 242 """ 243 S.replace(old, new[, count]) -> string 244 245 Return a copy of string S with all occurrences of substring 246 old replaced by new. If the optional argument count is 247 given...
如果没找到,报错 """ S.index(sub [,start [,end]]) -> int Like S.find() but raise ValueError when the substring is not found. """ return 0 def isalnum(self): """ 是否是字母和数字 """ """ S.isalnum() -> bool Return True if all characters in S are alphanumeric and there i...
S.replace(old, new[, count]) -> str #把字符串里指定的字符替换成新的字符 Return a copy of S with all occurrences of substring old replaced by new. If the optional argument count is given, only the first count occurrences are replaced. ...
Return an encoded version of the string. Default encoding is the current default string encoding. errors may be given to set a different error handling scheme. The default for errors is 'strict', meaning that encoding errors raise a UnicodeError. Other possible values are 'ignore', 'replace'...
技巧:1.双击Tab键可弹出对象非私有方法,如对象.+Tab两次;2.dir(对象)、vars(对象):查看对象的所有方法;3.help(对象.方法):方法的作用。 python的安装 Linux安装 说明:我的Centos6.8自带的python版本是2.6,原生python不支持自动补全,所以再安装一个ipython,ipython的版本和原生的python版本有对应 ...
41. Remove Non-Alphanumerics Write a Python program to remove everything except alphanumeric characters from a string. Click me to see the solution 42. Find URLs Write a Python program to find URLs in a string. Click me to see the solution ...
| | replace(...) | S.replace(old, new[, count]) -> str | | Return a copy of S with all occurrences of substring | old replaced by new. If the optional argument count is | given, only the first count occurrences are replaced. | | rfind(...) | S.rfind(sub[, start[, end]...
| | replace(self, old, new, count=-1, /) | Return a copy with all occurrences of substring old replaced by new. | | count | Maximum number of occurrences to replace. | -1 (the default value) means replace all occurrences. | | If the optional argument count is given, only the ...